D&T Alarms
• LO: To understand what switches
are for and how they are used?
How many switches
can you see in
the classroom?
How many did you find?
You may have found:
– Computer switch
– Light switch
– Plugs
– White board switches
– TV switch
– Fire alarm switch
– Radio/ CD player
Where do we find
switches?
How many other switches
can you think of……..
Working in teams
who can think of the most –
brainstorm your ideas!
What do you think this is?
Why do we have
switches?
• What are they for?
• Why not leave things on all of the time?
Switches
• Are used to turn things on and
off
• Need to make a connection to
work
• Switch is either open (off) or
closed (on)
• Need to form part of a circuit
Click this link to see a
working switch……
• http://www.schoolscience.co.uk/content/3/
physics/circuits/circh1pg1.html